Safety detonator

ABSTRACT

This invention relates to a detonator oriented towards the prevention of failure due to &#39;&#39;&#39;&#39;arcing&#39;&#39;&#39;&#39; or premature firing caused by ambient RF energy. (i.e., Radio, radar or microwave transmitters and static electricity.

Sites atem [1 1 Snyder Sept. 4, 1973 SAFETY DETONATOR 3,211,096 lO/1965 Fomey et al l02/28 R [76] Inventor: Richard N. Snyder, 6505 Lignum St 3,421,440 H1969 Snyder I02/70.2 R

Springfield, Va. OTHER PUBLICATIONS [22] Filed; J l 30, 1971 Materials, Vol. 60, No. 5, Reinhold Publishing Corp.,

Appl. No.: 167,694

Mid-October, 1964, page 236 relied on Primary Examiner-Verlin R. Pendegrass Att0rneyRichard N. Snyder 5 7 ABSTRACT This invention relates to a detonator oriented towards the prevention of failure due to arcing or premature firing caused by ambient RF energy. (i.e., Radio, radar or microwave transmitters and static electricity.)

3 Claims, 1 Drawing Figure as follows:

1. In an electric blasting cap, leadin wires (1) a firing initiator connected across the leadin wires (2) and an explosive change (3) adjacent to the firing initiator adapted to be ignited by said firing initiator, wherein said initiator is a thermistor.

2. Within an electric blasting cap as set forth in claim 1 where there is further provided an insulating means disposed around the firing initiator.

3. In an electric blasting cap as set forth in claim 2 where the insulating means is a floun'de-carbon insula- 

1. In an electric blasting cap, leadin wires (1) a firing initiator connected across the leadin wires (2) and an explosive change (3) adjacent to the firing initiator adapted to be ignited by said firing initiator, wherein said initiator is a thermistor.
 2. Within an electric blasting cap as set forth in claim 1 where there is further provided an insulating means disposed around the firing initiator.
 3. In an electric blasting cap as set forth in claim 2 where the insulating means is a flouride-carbon insulation. 